Trek Down Sleeping Bag (-1°C, -8°C & -12°C) 2022Sale
BEST USE: All outdoor activities
PERFORMANCE: 2 Season
WEIGHT: 2lbs 0.5oz | 920g
COMPRESSED VOLUME: 6.2 liters
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The Trek down sleeping bag brings the comfort of a tapered-rectangular mummy shape and the versatility of a dual-zip ventilation system to wherever your travels may take you. The full-length side zipper and secondary foot box zipper allow you to increase ventilation or open the Trek completely flat like a comforter, and the quality down will keep you warm and snug on chilly nights.
The broader mummy cut gives you room to move inside the bag, regardless of your sleeping position. A Regular Wide model is available for those who really appreciate the extra wiggle room.
Light and compact, the Trek might just become your favourite trekking / backpacking / travel / camping / down sleeping bag.
Best UseAll outdoor activities
Comes WithUltra-Sil Compression Sack & Storage Cube
InsulationUltra-Dry Down 650+ Loft
Shell Fabric30D Nylon Shell
Zip OptionsFull length left side and foot box zipper. Unzip fully to use as quilt or comforter. See ‘Features’ for bags which can be coupled to the Trek.
|Trek I (-1°C) Regular
|Trek I (-1°C) Regular Wide
|Trek I (-1°C) Long
|Trek II (-8°C) Regular
|Trek II (-8°C) Long
|Trek III (-12°C) Regular
650 Loft Ultra-Dry Down is used in the Sea to Summit Trek and Journey sleeping bags. 650+ Fill Power indicates that one ounce (30g) of down will re-expand to over 650 cubic inches after compression. This down provides an ideal warmth-to-weight ratio for the traveler, recreational camper, and occasional backpacker. The loft and down quality/composition are independently tested by the International Down and Feather Laboratory (IDFL) – a copy of the certification is supplied with every Sea to Summit sleeping bag. The down is responsibly sourced and RDS certified and treated with the environmentally-friendly water-repellant Ultra-Dry Down treatment.
100% of the down used in our sleeping bags and quilts is independently certified to the Responsible Down Standard (RDS). The RDS certifies down against animal welfare requirements and tracks it from the source to the final product. The purchase of RDS certified products demonstrates demand for better animal welfare practices in the down and feather supply chain. Sea to Summit is certified to the RDS. To learn more about RDS visit
Down and synthetic bags identified with our zip coupling symbol use a 65 inch #5 YKK full-length zip which allows a unisex left-handed and women's specific right-handed bag to pair together. Designed to pair side by side, each person sleeps in their own bag enabling each of you to take advantage of your bag's unique insulation zones, hood and footbox features - perfect for cozy adventures for two. Bags with full-length #5 YKK zips on both sides can also be coupled together with other pairing bags.
Frequently Asked questions
Warm enough for cool weather camping or travel?
Yes. The quality down and 3D hood keeps you warm when the mercury drops. For colder-weather use, you would probably choose the Trek -12°C which has a draft collar and pair it with a greater than 3.5 R-Value sleeping mat like the Comfort Light Insulated.
Suitable for summer temperatures?
Yes. A full-length side zipper and a secondary foot box zipper can be opened for ventilation or to turn the Trek into a fully-flat comforter in really warm weather.
Able to be zipped to another sleeping bag?
Yes. The main side zipper can be zipped to Sea to Summit Altitude, Journey or Venture sleeping bags. The Trek Regular and Long bags have the same side zipper length.